The Trump administration abruptly ended Harvard’s ability to enroll international students on Thursday — jeopardizing the legal status of more than one in four students on campus. Less than a day later,

A federal judge blocked the Trump administration’s move to prevent Harvard University from enrolling international students. Harvard has been at the center of the administration’s battle over higher education.

The court battle over Harvard's foreign students tests both the legality of the White House's tactics and the judicial system’s ability to rein in alleged government overreach.

College officials fear that President Trump may use international enrollment as leverage to demand changes on campuses elsewhere.